阅读说明：本技术 天线装置及电子设备 (Antenna device and electronic apparatus ) 是由 黄武鑫 于 2020-04-08 设计创作，主要内容包括：本申请实施例提供一种天线装置及电子设备,所述天线装置包括：近场通信芯片,包括第一差分信号端和第二差分信号端；切换开关；第一天线；第二天线；所述切换开关用于根据所述第一天线接收到的第一近场通信信号强度、所述第二天线接收到的第二近场通信信号强度接通所述第一天线与所述第一差分信号端或者接通所述第二天线与所述第二差分信号端。所述天线装置中,通过切换开关的切换,根据第一天线接收到的第一NFC信号强度、第二天线接收到的第二NFC信号强度接通第一天线或第二天线,也即根据不同天线接收到的NFC信号强度对天线进行切换,从而可以保证电子设备的NFC通信质量,提高电子设备对通信环境的适应性。(The embodiment of the application provides an antenna device and electronic equipment, the antenna device includes: the near field communication chip comprises a first differential signal end and a second differential signal end; a switch; a first antenna; a second antenna; the switch is used for connecting the first antenna and the first differential signal terminal or connecting the second antenna and the second differential signal terminal according to the strength of a first near field communication signal received by the first antenna and the strength of a second near field communication signal received by the second antenna. In the antenna device, through the switching of the selector switch, the first antenna or the second antenna is switched on according to the first NFC signal strength received by the first antenna and the second NFC signal strength received by the second antenna, namely, the antennas are switched according to the NFC signal strengths received by different antennas, so that the NFC communication quality of the electronic equipment can be ensured, and the adaptability of the electronic equipment to the communication environment is improved.)

1. An antenna device, comprising:

the near field communication chip comprises a first differential signal end and a second differential signal end;

a change-over switch electrically connected to the first differential signal terminal and the second differential signal terminal;

the first antenna is electrically connected with the change-over switch;

the second antenna is electrically connected with the change-over switch; wherein

The switch is used for connecting the first antenna and the first differential signal terminal or connecting the second antenna and the second differential signal terminal according to the strength of a first near field communication signal received by the first antenna and the strength of a second near field communication signal received by the second antenna.

2. The antenna device of claim 1, wherein the switch is further configured to:

when the first antenna and the first differential signal end are connected, the second differential signal end is controlled to be grounded;

and when the second antenna and the second differential signal end are connected, controlling the first differential signal end to be grounded.

3. The antenna device according to claim 1 or 2, wherein the changeover switch includes a first input terminal, a second input terminal, a first output terminal, and a second output terminal, the first input terminal is electrically connected to the first differential signal terminal, the second input terminal is electrically connected to the second differential signal terminal, the first output terminal is electrically connected to the first antenna, and the second output terminal is electrically connected to the second antenna;

the change-over switch is used for connecting the first input end and the first output end or connecting the second input end and the second output end according to the strength of the first near field communication signal and the strength of the second near field communication signal.

4. The antenna device of claim 3, wherein the switch further comprises a ground terminal, the ground terminal being grounded, the switch further configured to:

when the first input end and the first output end are connected, the second input end and the grounding end are connected;

and when the second input end and the second output end are connected, the first input end and the grounding end are connected.

5. The antenna device according to claim 1 or 2, further comprising a control circuit electrically connected to the first antenna, the second antenna, and the switch, wherein the control circuit is configured to control the switch according to the first near field communication signal strength and the second near field communication signal strength.

6. The antenna device of claim 5, wherein the control circuit is configured to:

when the strength of the first near field communication signal is greater than that of the second near field communication signal, controlling the selector switch to switch on the first antenna and the first differential signal end;

when the strength of the first near field communication signal is smaller than that of the second near field communication signal, controlling the change-over switch to switch on the second antenna and the second differential signal end;

and when the strength of the first near field communication signal is equal to that of the second near field communication signal, controlling the change-over switch to switch on the first antenna and the first differential signal end or switch on the second antenna and the second differential signal end.

7. The antenna device according to claim 1 or 2, wherein the near field communication chip further comprises a control signal output electrically connected to the switch, the near field communication chip being configured to:

generating a first load modulation amplitude signal according to the first near field communication signal strength;

generating a second load modulation amplitude signal according to the second near field communication signal strength;

and controlling the change-over switch according to the first load modulation amplitude signal and the second load modulation amplitude signal.

8. The antenna device of claim 7, wherein the near field communication chip is configured to:

when the first load modulation amplitude signal is greater than the second load modulation amplitude signal, controlling the change-over switch to switch on the first antenna and the first differential signal end;

when the first load modulation amplitude signal is smaller than the second load modulation amplitude signal, controlling the change-over switch to switch on the second antenna and the second differential signal end;

and when the first load modulation amplitude signal is equal to the second load modulation amplitude signal, controlling the change-over switch to switch on the first antenna and the first differential signal end or switch on the second antenna and the second differential signal end.

9. The antenna device of claim 3, wherein:

the first output end comprises a first sub-port and a second sub-port, and the first sub-port and the second sub-port are electrically connected with the first antenna;

the second output end comprises a third sub-port and a fourth sub-port, and the third sub-port and the fourth sub-port are both electrically connected with the second antenna.

10. The antenna device of claim 9, further comprising:

a first filter circuit electrically connected to the first sub-port, the second sub-port, and the first antenna;

a second filter circuit electrically connected to the third sub-port, the fourth sub-port, and the second antenna.

11. The antenna device of claim 3, further comprising:

a first matching circuit provided between the first output terminal and the first antenna;

a second matching circuit disposed between the second output terminal and the second antenna.

12. The antenna device according to claim 1 or 2, characterized in that the number of the first antennas is at least two and the number of the second antennas is also at least two.

13. An electronic device, characterized in that it comprises an antenna device according to any one of claims 1 to 12.

14. The electronic device of claim 13, further comprising:

the first communication circuit is used for outputting a first communication signal, wherein the first communication signal comprises at least one of a radio frequency signal, a wireless fidelity signal and a global positioning system signal;

the first antenna is also electrically connected with the first communication circuit, and the first antenna is also used for transmitting the first communication signal.

15. The electronic device of claim 13, further comprising:

the second communication circuit is used for outputting a second communication signal, and the second communication signal comprises at least one of a radio frequency signal, a wireless fidelity signal and a global positioning system signal;

the second antenna is also electrically connected with the second communication circuit and is also used for transmitting the second communication signal.

16. The electronic device of claim 13, further comprising:

the circuit board, the interval is provided with first printed wiring and second printed wiring on the circuit board, first antenna includes first printed wiring, the second antenna includes second printed wiring.

17. The electronic device of claim 13, further comprising:

the antenna comprises a metal frame, wherein a first metal branch and a second metal branch are formed on the metal frame at intervals, the first antenna comprises the first metal branch, and the second antenna comprises the second metal branch.

18. The electronic device of claim 13, further comprising:

the antenna comprises a battery cover, wherein a third metal branch and a fourth metal branch are formed on the battery cover at intervals, the first antenna comprises the third metal branch, and the second antenna comprises the fourth metal branch.

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to an antenna device and an electronic device.

Background

With the development of communication technology, electronic devices such as smart phones have more and more functions, and communication modes of the electronic devices are more diversified. For example, Near Field Communication (NFC) is increasingly available for electronic devices recently. Therefore, how to reasonably design the NFC antenna of the electronic device becomes a difficult problem.

Disclosure of Invention

The embodiment of the application provides an antenna device and electronic equipment, can switch the antenna according to the NFC signal intensity received by different antennas to improve the adaptability of electronic equipment to the communication environment.

An embodiment of the present application provides an antenna apparatus, including:

the near field communication chip comprises a first differential signal end and a second differential signal end;

a change-over switch electrically connected to the first differential signal terminal and the second differential signal terminal;

the first antenna is electrically connected with the change-over switch;

the second antenna is electrically connected with the change-over switch; wherein

The switch is used for connecting the first antenna and the first differential signal terminal or connecting the second antenna and the second differential signal terminal according to the strength of a first near field communication signal received by the first antenna and the strength of a second near field communication signal received by the second antenna.

The embodiment of the application further provides an electronic device, which comprises an antenna device, wherein the antenna device is the antenna device.

In the antenna device provided by the embodiment of the application, through the switching of the selector switch, the first antenna or the second antenna is switched on according to the first NFC signal strength received by the first antenna and the second NFC signal strength received by the second antenna, that is, the antennas are switched according to the NFC signal strengths received by different antennas, so that the NFC communication quality of the electronic equipment can be ensured, and the adaptability of the electronic equipment to the communication environment is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a first structural schematic diagram of an electronic device according to an embodiment of the present application.

Fig. 2 is a schematic view of a first structure of an antenna device according to an embodiment of the present application.

Fig. 3 is a schematic diagram of a second structure of an antenna device according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a third antenna device according to an embodiment of the present application.

Fig. 5 is a schematic diagram of a fourth structure of an antenna apparatus according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a fifth antenna device according to an embodiment of the present application.

Fig. 7 is a schematic diagram of a sixth structure of an antenna apparatus according to an embodiment of the present application.

Fig. 8 is a schematic diagram of a seventh structure of an antenna device according to an embodiment of the present application.

Fig. 9 is a schematic structural diagram of a second electronic device according to an embodiment of the present application.

Fig. 10 is a third schematic structural diagram of an electronic device according to an embodiment of the present application.

Fig. 11 is a fourth schematic structural diagram of an electronic device according to an embodiment of the present application.

Fig. 12 is a fifth structural schematic diagram of an electronic device according to an embodiment of the present application.

Fig. 13 is a sixth schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides electronic equipment. The electronic device may be a smart phone, a tablet computer, or other devices, and may also be a game device, an AR (Augmented Reality) device, an automobile device, a data storage device, an audio playing device, a video playing device, a notebook computer, a desktop computing device, or other devices.

Referring to fig. 1, fig. 1 is a schematic view of a first structure of an electronic device 100 according to an embodiment of the present disclosure.

The electronic device 100 includes a display screen 10, a housing 20, a circuit board 30, and a battery 40.

The display screen 10 is disposed on the casing 20 to form a display surface of the electronic device 100 for displaying images, texts, and other information. The display screen 10 may comprise a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) display screen or the like.

It will be appreciated that a cover plate may also be provided over the display screen 10 to protect the display screen 10 from scratching or water damage. The cover plate may be a transparent glass cover plate, so that a user can observe contents displayed on the display screen 10 through the cover plate. For example, the cover plate may be a glass cover plate of sapphire material.

The housing 20 is used to form an outer contour of the electronic apparatus 100 so as to accommodate electronic devices, functional components, and the like of the electronic apparatus 100, while forming a sealing and protecting function for the electronic devices and functional components inside the electronic apparatus. For example, the camera, the circuit board, and the vibration motor of the electronic device 100 may be disposed inside the housing 20. The housing 20 may include a middle frame and a battery cover.

The middle frame may have a thin plate-like or sheet-like structure, or may have a hollow frame structure. The middle frame is used for providing a supporting function for the electronic devices or functional components in the electronic device 100 so as to mount the electronic devices or functional components of the electronic device 100 together. For example, the middle frame may be provided with a groove, a protrusion, a through hole, and the like, so as to facilitate mounting of the electronic device or the functional component of the electronic apparatus 100. It is understood that the material of the middle frame may include metal or plastic.

The battery cover is connected with the middle frame. For example, the battery cover may be attached to the center frame by an adhesive such as a double-sided tape to achieve connection with the center frame. The battery cover is used for sealing the electronic devices and functional components of the electronic device 100 inside the electronic device 100 together with the middle frame and the display screen 10, so as to protect the electronic devices and functional components of the electronic device 100. It will be appreciated that the battery cover may be integrally formed. In the molding process of the battery cover, a post-camera mounting hole and other structures can be formed on the battery cover. It is understood that the material of the battery cover may also include metal or plastic.

A circuit board 30 is disposed inside the housing 20. For example, the circuit board 30 may be mounted on a middle frame of the case 20 to be fixed, and the circuit board 30 is sealed inside the electronic device by a battery cover. The circuit board 30 may be a main board of the electronic device 100. One or more of functional components such as a processor, a camera, an earphone interface, an acceleration sensor, a gyroscope, and a motor may also be integrated on the circuit board 30. Meanwhile, the display screen 10 may be electrically connected to the circuit board 30 to control the display of the display screen 10 by a processor on the circuit board 30.

The battery 40 is disposed inside the case 20. For example, the battery 40 may be mounted on a middle frame of the case 20 to be fixed, and the battery 40 is sealed inside the electronic device by a battery cover. Meanwhile, the battery 40 is electrically connected to the circuit board 30 to enable the battery 40 to supply power to the electronic device 100. The circuit board 30 may be provided thereon with a power management circuit. The power management circuit is used to distribute the voltage provided by the battery 40 to the various electronic devices in the electronic apparatus 100.

The electronic device 100 is further provided with an antenna device 200. The antenna apparatus 200 is used for implementing a wireless Communication function of the electronic device 100, for example, the antenna apparatus 200 may be used for implementing a Near Field Communication (NFC) function. The antenna device 200 is disposed inside the housing 20 of the electronic apparatus 100. It is understood that some components of the antenna device 200 may be integrated on the circuit board 30 inside the housing 20, for example, the signal processing chip and the signal processing circuit in the antenna device 200 may be integrated on the circuit board 30. In addition, some components of the antenna device 200 may be disposed directly inside the housing 20. For example, the antenna of the antenna device 200 may be disposed directly inside the housing 20.

Referring to fig. 2, fig. 2 is a schematic diagram of a first structure of an antenna apparatus 200 according to an embodiment of the present disclosure. The antenna device 200 includes a near field communication chip 21, a switch 22, a first antenna 23, and a second antenna 24.

In the description of the present application, it is to be understood that terms such as "first", "second", and the like are used merely to distinguish one similar element from another, and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated.

The near field communication chip (NFC chip) 21 may be configured to provide 2 differential signals, where the 2 differential signals may be output as 2 independent signals and are respectively provided with independent matching circuits for matching. Wherein the 2-way differential signal comprises two current signals. The two current signals are identical in amplitude and opposite in phase, or are understood to be 180 degrees out of phase. In addition, the 2 paths of differential signals are balanced signals. It can be understood that the analog signal is an unbalanced signal if directly transmitted during the transmission process; if the original analog signal is inverted and then the inverted analog signal and the original analog signal are transmitted simultaneously, the inverted analog signal and the original analog signal are called balanced signals.

The NFC chip 21 includes a first differential signal terminal 211 and a second differential signal terminal 212. For example, the first differential signal terminal 211 may be a positive (+) port of the NFC chip 21, and the second differential signal terminal 212 may be a negative (-) port of the NFC chip 21. The first differential signal terminal 211 and the second differential signal terminal 212 are used for providing the 2-way differential signal. For example, the first differential signal terminal 211 may provide 1-way differential signals, and the second differential signal terminal 212 may provide another 1-way differential signals.

It is understood that the NFC chip 21 may be disposed on the circuit board 30 of the electronic device 100, or a smaller separate circuit board may be disposed in the electronic device 100, and the NFC chip 21 is integrated on the separate circuit board. The separate circuit board may be, for example, a small board in the electronic device 100.

The switch 22 is electrically connected to the first differential signal terminal 211 and the second differential signal terminal 212 of the NFC chip 21. The switch 22 may be used to switch the state of the antenna device 200.

The first antenna 23 and the second antenna 24 are both electrically connected to the changeover switch 22. Both the first antenna 23 and the second antenna 24 can be used for transmitting wireless signals, so as to realize wireless communication between the electronic device 100 and other electronic devices. For example, the first antenna 23 may be configured to transmit one of 2 differential signals provided by the NFC chip 21, and generate an independent resonant mode; the second antenna 24 may be configured to transmit the other of the 2 differential signals provided by the NFC chip 21 and generate another independent resonant mode.

The first antenna 23 and the second antenna 24 may be independent radiators, metal structures in the electronic device 100, or metal traces on the circuit board 30.

For example, the circuit board 30 of the electronic device 100 has a first printed circuit and a second printed circuit disposed at an interval. Wherein the first printed circuit and the second printed circuit are used for transmitting electric signals. The first antenna 23 may include the first printed wiring, and the second antenna 24 may include the second printed wiring.

For another example, the electronic device 100 includes a Flexible Printed Circuit (FPC) electrically connected to the Circuit board 30. The FPC may be, for example, an FPC of a display screen, an FPC of a camera, an FPC of a motor, or the like, or the FPC may be an independent FPC for implementing an NFC function, and may be fixed in the housing of the electronic device 100. The FPC is provided with metal wiring, and the metal wiring is used for transmitting signals, such as control signals of a display screen, control signals of a camera, control signals of a motor and the like. The first antenna 23 may include the metal trace, or the second antenna 24 may include the metal trace.

For another example, the housing 20 of the electronic device 100 includes a metal bezel, which may be disposed around the periphery of the middle bezel. The metal frame comprises a first metal branch and a second metal branch which are arranged at intervals. For example, a plurality of slits may be formed in the metal bezel, and the first metal branch and the second metal branch may be formed by the plurality of slits. The first antenna 23 may include the first metal branch, and the second antenna 24 may include the second metal branch. It is understood that the first metal branch and the second metal branch may also be used as a cellular communication antenna of the electronic device 100, such as an LTE antenna or a Sub 6G antenna. Further, in order to increase the NFC field intensity, the first antenna 23 may further include one or more metal traces connected to the first metal branch, for example, a printed circuit on an FPC, on the basis of including the first metal branch, so as to extend a current path of the first antenna 23.

It is understood that, when the first antenna 23 and the second antenna 24 transmit wireless signals, NFC signals can be received from the outside. The strength of the NFC signal received by the first antenna 23 may be denoted as a first near field communication signal strength (first NFC signal strength), and the strength of the NFC signal received by the second antenna 24 may be denoted as a second near field communication signal strength (second NFC signal strength). It is to be appreciated that the first and second NFC Signal strengths may be Received Signal Strength Indications (RSSI).

The switch 22 may be configured to switch on the first antenna 23 and the first differential signal terminal 211 of the NFC chip 21 or switch on the second antenna 24 and the second differential signal terminal 212 of the NFC chip 21 according to the first NFC signal strength and the second NFC signal strength. When the first antenna 23 and the first differential signal terminal 211 of the NFC chip 21 are turned on, the first antenna 23 may be configured to transmit a path of differential signals provided by the first differential signal terminal 211; when the second antenna 24 and the second differential signal terminal 212 of the NFC chip 21 are turned on, the second antenna 24 may be configured to transmit a path of differential signal provided by the second differential signal terminal 212.

When the electronic device 100 performs NFC communication with another electronic device, two communication modes are included: NFC card reader mode, NFC card emulation mode.

In the NFC card reader mode, the electronic device 100 operates as an NFC card reader to read NFC signals of other devices, for example, information of a bus card may be read to query a balance of the bus card. In the NFC card reader mode, the first antenna 23 and the second antenna 24 of the electronic device 100 may detect external NFC field strengths, respectively, and determine which antenna to switch to operate according to the detected NFC field strengths.

For example, the electronic device 100 may switch on the first antenna 23 and the second antenna 24 simultaneously, and detect the external NFC field strength simultaneously through the first antenna 23 and the second antenna 24. And after the detection result is obtained, disconnecting the antenna with the detected NFC field intensity weaker, and keeping the antenna with the detected NFC field intensity stronger to continue working. For example, when the NFC field intensity detected by the first antenna 23 is strong and the NFC field intensity detected by the second antenna 24 is weak, the second antenna 24 is turned off, and the first antenna 23 is kept to continue to operate.

For another example, the electronic device 100 may also switch on the first antenna 23 and the second antenna 24 in sequence, and detect the external NFC field strength through the switched antennas. And after the detection result is obtained, switching to the antenna with the detected strong NFC field intensity to work. For example, the first antenna 23 is first turned on and the NFC field intensity is detected, then the first antenna 23 is turned off, the second antenna 24 is turned on and the NFC field intensity is detected, and then the second antenna 24 is turned off, and if the NFC field intensity detected by the first antenna 23 is stronger, the first antenna 23 is switched to operate, and if the NFC field intensity detected by the second antenna 24 is stronger, the second antenna 24 is switched to operate.

In the NFC card simulation mode, the electronic device 100 operates as an NFC card for other electronic devices to read NFC signals, for example, the electronic device 100 may be used as a bus card for swiping. In the NFC card simulation mode, after receiving an NFC signal sent by an NFC reader (e.g., an NFC swipe), the electronic device 100 returns a Load modulation amplitude signal (LMA), and determines which antenna to switch to operate according to the LMA.

For example, the electronic device 100 may first switch on the first antenna 23, receive a first NFC signal from the outside via the first antenna 23, and return a first load modulated amplitude signal according to the first NFC signal, then switch off the first antenna 23 and switch on the second antenna 24, receive a second NFC signal from the outside via the second antenna 24, and return a second load modulated amplitude signal according to the second NFC signal. Subsequently, the electronic device 100 may switch to the antenna operation with the larger load modulation amplitude signal.

In practical applications, the first antenna 23 and the second antenna 24 may be disposed at different positions of the electronic device 100. For example, the first antenna 23 may be disposed at the top of the electronic device 100, and the second antenna 24 may be disposed at the bottom of the electronic device 100. When the electronic device 100 performs NFC communication with another electronic device (e.g., an NFC reader), the strength of the NFC signal received by the first antenna 23 and the second antenna 24 may be different. Therefore, by switching the switch 22, the first antenna 23 or the second antenna 24 is switched on according to the strength of the first NFC signal received by the first antenna 23 and the strength of the second NFC signal received by the second antenna 24, that is, the antennas are switched according to the strength of the NFC signals received by different antennas, so that the NFC communication quality of the electronic device 100 can be ensured, and the adaptability of the electronic device 100 to the communication environment is improved.

It is understood that the antenna generates a resonance mode when transmitting a wireless signal. Therefore, when the first antenna 23 is transmitting NFC signals, a resonance mode is generated; a resonant mode is also generated when the second antenna 24 is transmitting NFC signals. If the first antenna 23 and the second antenna 24 operate simultaneously, two resonance modes are generated, which causes interference between each other and reduces NFC communication quality.

In order to avoid interference between the first antenna 23 and the second antenna 24, when one antenna and one differential signal terminal of the NFC chip 21 are turned on, the other differential signal terminal of the NFC chip 21 may be controlled to be grounded.

Therefore, the switch 22 may also be configured to control the second differential signal terminal 212 of the NFC chip 21 to be grounded when the first antenna 23 and the first differential signal terminal 211 of the NFC chip 21 are turned on; when the second antenna 24 and the second differential signal terminal 212 of the NFC chip 21 are turned on, the first differential signal terminal 211 of the NFC chip 21 is controlled to be grounded.

In some embodiments, referring to fig. 3, fig. 3 is a schematic diagram of a second structure of an antenna apparatus 200 according to an embodiment of the present disclosure.

The switch 22 includes a first input terminal 221, a second input terminal 222, a first output terminal 223, a second output terminal 224, and a ground terminal 225. The first input terminal 221 is electrically connected to the first differential signal terminal 211 of the NFC chip 21. The second input terminal 222 is electrically connected to the second differential signal terminal 212 of the NFC chip 21. The first output terminal 223 is electrically connected to the first antenna 23. The second output 224 is electrically connected to the second antenna 24. The ground terminal 225 is grounded.

The switch 22 may be configured to switch on the first input terminal 221 and the first output terminal 223 according to the first NFC signal strength and the second NFC signal strength to switch on the first antenna and the first differential signal terminal 211; or to turn on the second input terminal 222 and the second output terminal 224 to turn on the second antenna 24 and the second differential signal terminal 212.

The switch 22 may be further configured to switch on the second input terminal 222 and the ground terminal 225 when the first input terminal 221 and the first output terminal 223 are switched on, so as to control the second differential signal terminal 212 of the NFC chip 21 to be grounded; when the second input terminal 222 and the second output terminal 224 are turned on, the first input terminal 221 and the ground terminal 225 are turned on to control the first differential signal terminal 211 of the NFC chip 21 to be grounded.

In some embodiments, referring to fig. 4, fig. 4 is a schematic structural diagram of a third antenna device 200 according to an embodiment of the present disclosure.

The switch 22 may comprise a double-pole triple-throw switch, i.e. comprising 2 fixed terminals and 3 throw terminals. The switch 22 may also include 2 single-pole double-throw switches, and the 2 single-pole double-throw switches share 1 throw terminal, and the shared throw terminal is the ground terminal 225.

In some embodiments, referring to fig. 5, fig. 5 is a schematic diagram of a fourth structure of an antenna apparatus 200 according to an embodiment of the present disclosure.

The antenna device 200 further comprises a control circuit 25. The control circuit 25 may be disposed on a circuit board 30 of the electronic device 100. The control circuit 25 is electrically connected to the first antenna 23, the second antenna 24, and the changeover switch 22. The control circuit 25 is configured to control the switch 22 according to the first NFC signal strength and the second NFC signal strength.

The control circuit 25 may include a first signal collecting terminal 251, a second signal collecting terminal 252, and a control terminal 253. The first signal collecting terminal 251 is electrically connected to the first antenna 23. The second signal collecting terminal 252 is electrically connected to the second antenna 24.

The switch 22 includes a control signal input 226. The control signal input terminal 226 is electrically connected to the control terminal 253 of the control circuit 25.

The control circuit 25 may obtain a first NFC signal strength received by the first antenna 23 through the first signal collecting terminal 251, obtain a second NFC signal strength received by the second antenna 24 through the second signal collecting terminal 252, compare the first NFC signal strength with the second NFC signal strength, and control the switch 22 according to a comparison result.

When the first NFC signal strength is greater than the second NFC signal strength, the control circuit 25 controls the switch 22 to turn on the first antenna 23 and the first differential signal terminal 211 of the NFC chip 21. When the first NFC signal strength is smaller than the second NFC signal strength, the control circuit 25 controls the switch 22 to turn on the second antenna 24 and the second differential signal terminal 212 of the NFC chip 21. When the first NFC signal strength is equal to the second NFC signal strength, the control circuit 25 controls the switch 22 to turn on the first antenna 23 and the first differential signal terminal 211 or turn on the second antenna 24 and the second differential signal terminal 212.

Accordingly, the antenna device 200 can perform NFC communication with an antenna having a better received NFC signal strength by switching the switch 22, and thus, the NFC communication stability of the electronic device 100 and the adaptability to the communication environment can be improved.

In some embodiments, referring to fig. 6, fig. 6 is a schematic diagram illustrating a fifth structure of an antenna apparatus 200 according to an embodiment of the present disclosure.

The NFC chip 21 further includes a control signal output terminal 213. The control signal output terminal 213 is electrically connected to the switch 22. For example, the switch 22 includes a control signal input terminal 226, and the control signal output terminal 213 may be electrically connected to the control signal input terminal 226.

The NFC chip 21 may also be configured to: a first Load modulation amplitude signal (LMA) is generated according to the first NFC signal strength, a second Load modulation amplitude signal is generated according to the second NFC signal strength, and the switch 22 is controlled according to the first Load modulation amplitude signal and the second Load modulation amplitude signal.

The load modulation amplitude signal is positively correlated with the strength of the NFC signal received by the antenna. That is, the greater the NFC signal strength received by the antenna, the greater the corresponding load modulation amplitude signal.

It is to be understood that, in the antenna apparatus 200, the switch 22 may control the first input terminal 221 to turn on the first output terminal 223, and control the second input terminal 222 to turn on the second output terminal 224, so that the NFC chip 21 obtains, through the switch 22, the first NFC signal strength received by the first antenna 23 and the second NFC signal strength received by the second antenna 24. After the NFC chip 21 obtains the first NFC signal strength and the second NFC signal strength, the switch 22 may control to disconnect the first input terminal 221 and the first output terminal 223, and disconnect the second input terminal 222 and the second output terminal 224.

The NFC chip 21 may compare the first load modulation amplitude signal and the second load modulation amplitude signal, and control the switch 22 according to a comparison result.

When the first load modulation amplitude signal is greater than the second load modulation amplitude signal, the NFC chip 21 controls the switch 22 to turn on the first antenna 23 and the first differential signal terminal 211 of the NFC chip 21. When the first load modulation amplitude signal is smaller than the second load modulation amplitude signal, the NFC chip 21 controls the switch 22 to turn on the second antenna 24 and the second differential signal terminal 212 of the NFC chip 21. When the first load modulation amplitude signal is equal to the second load modulation amplitude signal, the NFC chip 21 controls the switch 22 to turn on the first antenna 23 and the first differential signal terminal 211 or turn on the second antenna 24 and the second differential signal terminal 212.

Accordingly, the antenna device 200 can perform NFC communication with an antenna having a better received NFC signal strength by switching the switch 22, and thus, the NFC communication stability of the electronic device 100 and the adaptability to the communication environment can be improved.

In some embodiments, referring to fig. 7, fig. 7 is a schematic diagram illustrating a sixth structure of an antenna apparatus 200 according to an embodiment of the present application.

The first differential signal terminal 211 of the NFC chip 21 may include a first transmitting terminal 211a and a first receiving terminal 211b, and the second differential signal terminal 212 may include a second transmitting terminal 212a and a second receiving terminal 212 b. The first transmitting terminal 211a and the second transmitting terminal 212a may be configured to output differential signals. The first receiving end 211b and the second receiving end 212b may be configured to receive differential signals input from the outside.

The first output terminal 223 of the switch 22 may include a first sub-port 223a and a second sub-port 223b, the second output terminal 224 may include a third sub-port 224a and a fourth sub-port 224b, the first input terminal 221 may include a fifth sub-port 221a and a sixth sub-port 221b, and the second input terminal 222 may include a seventh sub-port 222a and an eighth sub-port 222 b.

Wherein the first sub-port 223a and the second sub-port 223b are electrically connected to the first antenna 23. The third sub-port 224a and the fourth sub-port 224b are electrically connected to the second antenna 24. The fifth sub-port 221a is electrically connected to the first transmitting terminal 211a of the NFC chip 21. The sixth sub-port 221b is electrically connected to the first receiving end 211b of the NFC chip 21. The seventh sub-port 222a is electrically connected to the second transmitting terminal 212a of the NFC chip 21, and the eighth sub-port 222b is electrically connected to the second receiving terminal 212b of the NFC chip 21.

The first sub-port 223a and the fifth sub-port 221a may be configured to transmit an uplink NFC signal output by the first transmitting end 211 a. The second sub-port 223b and the sixth sub-port 221b may be configured to transmit the downlink NFC signal received by the first antenna 23 to the first receiving end 211 b. The third sub-port 224a and the seventh sub-port 222a may be configured to transmit an uplink NFC signal output by the second transmitting end 212 a. The fourth sub-port 224b and the eighth sub-port 222b may be configured to transmit the downlink NFC signal received by the second antenna 24 to the second receiving end 212 b.

It can be understood that the uplink NFC signal is an NFC signal transmitted to the outside by the antenna device 200, and the downlink NFC signal is an NFC signal received by the antenna device 200 from the outside.

With continued reference to fig. 7, the antenna device 200 further includes a first filter circuit 261, a second filter circuit 262, a first matching circuit 271, and a second matching circuit 272. The filter circuit may also be referred to as a filter network, and the matching circuit may also be referred to as a matching network, a tuning circuit, a tuning network, or the like.

Wherein the first filter circuit 261 is electrically connected to the first sub-port 223a, the second sub-port 223b, and the first antenna 23. The first filter circuit 261 is configured to isolate the uplink NFC signal output by the first transmitter 211a from the downlink NFC signal received by the first antenna 23.

The second filter circuit 262 is electrically connected to the third sub-port 224a, the fourth sub-port 224b, and the second antenna 24. The second filter circuit 262 is configured to isolate the uplink NFC signal output by the second transmitting terminal 212a from the downlink NFC signal received by the second antenna 24.

The first matching circuit 271 is disposed between the first output terminal 223 of the switch 22 and the first antenna 23. For example, the first matching circuit 271 may be disposed between the first filter circuit 261 and the first antenna 23. The first matching circuit 271 is configured to match the impedance of the first antenna 23 when transmitting an NFC signal.

The second matching circuit 272 is disposed between the second output 224 of the switch 22 and the second antenna 24. For example, the second matching circuit 272 may be disposed between the second filtering circuit 262 and the second antenna 24. The second matching circuit 272 is used for matching the impedance of the second antenna 24 when transmitting NFC signals.

In some embodiments, referring to fig. 8, fig. 8 is a schematic diagram illustrating a seventh structure of an antenna apparatus 200 according to an embodiment of the present disclosure.

The first filter circuit 261 may include, for example, an inductor L1 and a capacitor C1. Wherein an inductor L1 is connected in series between the first sub-port 223a and the first antenna 23, a capacitor C1 is connected between the inductor L1 and the first antenna 23, and a capacitor C1 is connected to ground.

The second filter circuit 262 may include, for example, an inductor L2 and a capacitor C2. Wherein an inductor L2 is connected in series between the third sub-port 224a and the second antenna 24, a capacitor C2 is connected between the inductor L2 and the second antenna 24, and a capacitor C2 is connected to ground.

The first matching circuit 271 may include, for example, a capacitor C5 and a capacitor C7. Wherein a capacitor C5 is connected in series between the first filter circuit 261 and the first antenna 23, a capacitor C7 is connected between a capacitor C5 and the first antenna 23, and a capacitor C7 is grounded.

The second matching circuit 272 may include, for example, a capacitor C6 and a capacitor C8. Wherein a capacitor C6 is connected in series between the second filter circuit 262 and the second antenna 24, a capacitor C8 is connected between the capacitor C6 and the second antenna 24, and a capacitor C8 is connected to ground.

In addition, a resistor R1 and a capacitor C3 may be disposed between the second sub-port 223b and the first filter circuit 261. A resistor R2 and a capacitor C4 may be further disposed between the fourth sub-port 224b and the second filter circuit 262. A resistor R3 may be further disposed between the first matching circuit 271 and the first antenna 23. A resistor R4 may also be provided between the second matching circuit 272 and the second antenna 24.

In some embodiments, referring to fig. 9, fig. 9 is a schematic view of a second structure of an electronic device 100 according to an embodiment of the present disclosure.

The electronic device 100 further includes a first communication circuit 281 and a second communication circuit 282. The first communication circuit 281 and the second communication circuit 282 may be disposed on the circuit board 30 of the electronic device 100. The first communication circuit 281 is configured to output a first communication signal, which includes at least one of a radio frequency signal, a wireless fidelity signal, and a global positioning system signal. The second communication circuit 282 is configured to output a second communication signal, where the second communication signal includes at least one of a radio frequency signal, a wireless fidelity signal, and a global positioning system signal.

The first antenna 23 is also electrically connected to the first communication circuit 281. The first antenna 23 is also used for transmitting the first communication signal. Thus, multiplexing of the first antenna 23 may be achieved, and both NFC signals and the first communication signals may be transmitted through the first antenna 23.

The second antenna 24 is also electrically connected to the second communication circuit 282. The second antenna 24 is also used for transmitting the second communication signal. Thus, multiplexing of the second antenna 24 may be achieved, and both NFC signals and the second communication signals may be transmitted via the second antenna 24.

For example, the first communication circuit 281 may be an LTE communication circuit, and the second communication circuit 282 may be a Sub 6G communication circuit. Thus, the first antenna 23 may be multiplexed as an LTE antenna, and the second antenna 24 may be multiplexed as a Sub 6G antenna.

In some embodiments, referring to fig. 10, fig. 10 is a schematic structural diagram of a third electronic device 100 provided in the embodiments of the present application.

The electronic device 100 further includes a first isolation circuit 291 and a second isolation circuit 292.

The first isolation circuit 291 is disposed between the first antenna 23 and the first communication circuit 281. That is, the first antenna 23 is electrically connected to the first communication circuit 281 through the first isolation circuit 291. The first isolation circuit 291 is configured to isolate the NFC signal transmitted by the first antenna 23, so as to avoid the NFC signal transmitted by the first antenna 23 from interfering with the first communication signal.

The second isolation circuit 292 is disposed between the second antenna 24 and the second communication circuit 282. That is, the second antenna 24 is electrically connected to the second communication circuit 282 through the second isolation circuit 292. The second isolation circuit 292 is configured to isolate the NFC signal transmitted by the second antenna 24, so as to avoid the NFC signal transmitted by the second antenna 24 from interfering with the second communication signal.

It is understood that the first isolation circuit 291 and the second isolation circuit 292 may comprise a series or parallel circuit of a capacitor and an inductor.

In some embodiments, referring to fig. 11, fig. 11 is a fourth structural diagram of an electronic device 100 provided in the embodiments of the present application.

In the antenna device 200, the number of the first antennas 23 is at least two, and the number of the second antennas 24 is also at least two. For example, as shown in fig. 9, the number of the first antennas 23 is two, and the number of the second antennas 24 is also two. The two first antennas 23 are disposed at different positions of the electronic apparatus 100, and the two second antennas 24 are also disposed at different positions of the electronic apparatus 100. For example, one first antenna 23 may be disposed on the top of the electronic device 100, another first antenna 23 may be disposed on the bottom of the electronic device 100, one second antenna 24 may be disposed on a side of the electronic device 100, and another second antenna 24 may be disposed on another side of the electronic device 100. Therefore, different parts of the electronic device 100 can receive the NFC signal, and the NFC reading area of the electronic device 100, that is, the NFC card swiping area of the electronic device 100, can be increased. The at least one first antenna and the at least one second antenna are arranged at different positions on the periphery of the electronic equipment, and the first antenna or the second antenna is switched and selected to work according to the NFC signal strength received by the first antenna and the second antenna, so that the electronic equipment can be self-adaptively switched to the antennas at different positions to carry out NFC communication. For example, if the electronic device operates in the card simulation mode, the corresponding antenna can be switched to operate according to different orientations of the electronic device, and the antenna facing one side of the card reader can be switched to operate, so that multi-angle adaptive card swiping is realized.

In some embodiments, referring to fig. 12, fig. 12 is a schematic diagram of a fifth structure of an electronic device 100 according to an embodiment of the present disclosure.

The electronic device 100 includes a metal bezel 50. The metal bezel 50 may be formed as part of the housing 20. The metal frame 50 may be an aluminum alloy frame, for example. The metal bezel 50 may surround the periphery of the middle frame of the electronic device 100. Wherein, a first metal branch 51 and a second metal branch 52 are formed on the metal frame 50 at intervals. For example, a slit 53 and a slit 54 may be formed in the metal bezel 50, and the first metal branch 51 and the second metal branch 52 may be formed by the slit 53 and the slit 54. The first antenna 23 includes the first metal branch 51, and the second antenna 24 includes the second metal branch 52.

Therefore, the first antenna 23 and the second antenna 24 do not need to be separately arranged on the electronic device 100, the first antenna 23 and the second antenna 24 can be formed through the metal frame 50, and the design of the NFC antenna can be simplified.

In some embodiments, referring to fig. 13, fig. 13 is a schematic diagram of a sixth structure of an electronic device 100 according to an embodiment of the present disclosure.

The electronic device 100 includes a battery cover 60. The battery cover 60 may be included as part of the housing 20. The battery cover 60 may be, for example, an aluminum alloy battery cover. The battery cover 60 is used to cover the battery 40 of the electronic device 100. Wherein, a third metal branch 61 and a fourth metal branch 62 are formed at intervals on the battery cover 60. For example, 2U-shaped slits may be formed in the battery cover 60, one U-shaped slit forming the third metal branch 61, and the other U-shaped slit forming the fourth metal branch 62. For another example, an E-shaped gap may be formed in the battery cover 60, and the third metal branch 61 and the fourth metal branch 62 may be formed through the E-shaped gap. Wherein the first antenna 23 includes the third metal branch 61, and the second antenna 24 includes the fourth metal branch 62.

Therefore, the first antenna 23 and the second antenna 24 can be formed by the battery cover 60 without separately providing the first antenna 23 and the second antenna 24 on the electronic device 100, and the design of the NFC antenna can be simplified.

It is understood that in some other embodiments, the first antenna 23 may be disposed on a metal frame of the electronic device 100, for example, the first antenna 23 is formed by a fifth metal branch on the metal frame. The second antenna 24 may be disposed on a battery cover of the electronic device 100, for example, the second antenna 24 may be formed on the inner side of the battery cover by attaching an FPC, or by a PDL, PDS, or the like. In this way, different antennas may be switched for NFC communication depending on the orientation of the electronic device 100. For example, if the electronic device 100 operates in the NFC card simulation mode, if the display screen side faces the card reader, the first antenna 23 on the metal frame may be switched to operate, and if the battery cover faces the card reader, the second antenna 24 on the battery cover may be switched to operate, so that front and back sides of the electronic device can be adaptively swiped in the NFC card simulation mode.

The antenna device and the electronic device provided in the embodiments of the present application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.